California Congressmember Ronald V. Dellums addresses the Third Annual Black Arts Cultural Festival speaking about his support for Shirley Chisholm and the integrity of coalition politics. For additional information see California Revealed .
Topic: californiarevealed
Source: Audio cassette: 1 Tape of 1
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Pierre Chardy
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Colin P Groves
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Liberation News Service
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T R Mitra
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A Neboiss
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Sep 20, 2019
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C Van Achterberg
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Source: 16 Pages of 16: Pamphlet ( 8.5 x 11 in.) Digitized by California Revealed .
Topics: californialightandsound, californiarevealed
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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State of Kerala
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Nov 1, 2018
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KABIR, HUMAYUN ED.
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Source: West Bengal Public Library Network Source Identifier: handle/10689/18941 Field Value Lang dc.contributor.author KABIR, HUMAYUN ED. - dc.date.accessioned 2014-08-05T06:50:40Z - dc.date.available 2014-08-05T06:50:40Z - dc.date.issued 1974 - dc.identifier.uri http://hdl.handle.net/10689/18941 - dc.language.iso other en_US dc.publisher AATAUR RAHAMAN, CALCUTTA en_US dc.source UTTARPARA JAYKRISHNA PUBLIC LIBRARY, HOOGHLY en_US dc.subject GENERALITIES en_US dc.subject SERIAL PUBLICATION en_US...
Topic: West Bengal Public Library
Metal smeared into grooves of serial numbers by grinding or filing can be cleaned out by process called cavitation. Ultrasonic vibrator generates very high frequency vibrations in water which create millions of microscopic bubbles. Cavitation bubbles impact metal surface at thousands of pounds per square inch pressure. Metal particles filling grooves are broken away.
Topics: NASA Technical Reports Server (NTRS), CAVITATION FLOW, ETCHING, MARKING, PIEZOELECTRIC TRANSDUCERS,...
The prediction of long-term geothermal reservoir performance and the environmental impact of exploiting this resource are two important problems associated with the utilization of geothermal energy for power production. Our research effort addresses these problems through numerical simulation. Computer codes based on the solution of partial-differential equations using finite-element techniques are being prepared to simulate multiphase energy transport, energy transport in fractured porous...
Topics: NASA Technical Reports Server (NTRS), ENERGY TECHNOLOGY, ENVIRONMENT PROTECTION, GEOTHERMAL ENERGY...
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Jul 12, 2020
07/20
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Kap Yong Paik
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Jul 13, 2021
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Comisiones Obreras de Cataluña
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Facsímil de Asamblea Obrera. Número 121 Barcelona, 18 de noviembre de 1974 Octavilla reproducida por multicopista. 2 páginas. Fondo Perramón de la FGB
Topics: Sindicalismo, Comisiones Obreras, Tardofranquismo, Movimiento obrero, Cataluña
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Oct 11, 2019
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S L Clement
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Oct 8, 2019
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A Neboiss
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Topics: agriculture, agronomie, cultures, nuisibles, maladies, veille, alertes, agronomy, crops, pest,...
Topics: agriculture, agronomie, cultures, nuisibles, maladies, veille, alertes, agronomy, crops, pest,...
Topics: agriculture, agronomie, cultures, nuisibles, maladies, veille, alertes, agronomy, crops, pest,...
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May 17, 2014
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Rod Walker
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Rod Walker's zine for when he took over the Postal Diplomacy Rating Commission.
Topics: diplomacy, dippy, zine, fanzine, dipzine
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Apr 3, 2019
04/19
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Joseph Hartman
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Channel sandstone concretions of the Tongue River Formation, McCone County, Montana Description: Channel sandstone concretions in the Tongue River Formation (Fort Union Group), McCone County, Montana. The channel sandstone trends to the southeast and is preserved in a Holocene deflation basin. Chronostratigraphy: Paleocene. Lithostratigraphy: Tongue River Formation (Fort Union Group). Geologic province: Williston Basin. Location: USA ▹ Montana ▹ McCone. Near Circle. Collection: Joseph...
Topics: geology, mineralogy
High-speed switching circuit protects detectors from sudden, extremely-intense backscattered radiation that results from short-range atmospheric dust layers, or low-level clouds, entering laser/radar field of view. Function of circuit is to provide computer-controlled switching of photodiode detector, preamplifier power-supply voltages, in approximately 10 nanoseconds.
Topics: NASA Technical Reports Server (NTRS), INTEGRATED CIRCUITS, LASERS, OPTICAL RADAR, PHOTODIODES,...
A study was conducted in which subjects judged aircraft noises in the presence of road traffic background noise. Two different techniques for presenting the background noises were evaluated. For one technique, the background noise was continuous over the whole of a test session. For the other, the background noise was changed with each aircraft noise. A range of aircraft noise levels and traffic noise levels were presented to simulate typical indoor levels.
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT NOISE, BACKGROUND NOISE, NOISE POLLUTION, TRAFFIC,...
There are no author-identified significant results in this report.
Topics: NASA Technical Reports Server (NTRS), DRAINAGE PATTERNS, KANSAS, OPTICAL DATA PROCESSING, STREAMS,...
An improved vidicon image sensor for space astronomy applications is developed that features reliably sealed ultraviolet transmitting windows and achieves acceptable photocathode quantum efficiency on these MgF2 windows. New preamplifier designs improve the dynamic range by reduction of the readout noise.
Topics: NASA Technical Reports Server (NTRS), SPACEBORNE ASTRONOMY, TELEVISION TRANSMISSION, VIDICONS,...
FORTRAN computer subroutines stemming from requirements to process state variable system equations for systems of high order are presented. They find the characteristic equation of a matrix using the method of Danilevsky, the number of roots with positive real parts using the Routh-Horwitz alternate formulation, convert a state variable system description to a Laplace transfer function using the method of Bollinger, and evaluate that transfer function and obtain its frequency response. A sample...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, COMPUTER TECHNIQUES, EQUATIONS OF MOTION,...
The survey of negative pion absorption reactions on light and medium nuclei was continued. Muon spin precession was studied using an iron target. An impulse approximation model of the pion absorption process implied that the ion will absorb almost exclusively on nucleon pairs, single nucleon absorption being suppressed by energy and momentum conservation requirements. For measurements on both paramagnetic and ferromagnetic iron, the external magnetic field was supplied by a large C-type...
Topics: NASA Technical Reports Server (NTRS), MUONS, PIONS, FERROMAGNETISM, IRON, PARTICLE SPIN, SOLID...
X-rays from a 25-hJ plasma focus apparatus were observed with pinhole cameras. The cameras consist of 0.4 mm diameter pinholes in 2 cm thick lead housing enclosing an X-ray intensifying screen at the image plane. Pictures recorded through thin aluminum foils or plastic sheets for X-ray energies sub gamma smaller than 15 keV show distributed X-ray emissions from the focussed plasma and from the anode surface. However, when thick absorbers are used, radial filamentary structure in the X-ray...
Topics: NASA Technical Reports Server (NTRS), EMISSION SPECTRA, HIGH TEMPERATURE PLASMAS, X RAYS, ANODES,...
The task phase concerned with the requirements, design, and planning studies for the carry-on laboratory (COL) began with a definition of biomedical research areas and candidate research equipment, and then went on to develop conceptual layouts for COL which were each evaluated in order to arrive at a final conceptual design. Each step in this design/evaluation process concerned itself with man/systems integration research and hardware, and life support and protective systems research and...
Topics: NASA Technical Reports Server (NTRS), LIFE SCIENCES, PAYLOADS, PROJECT PLANNING, SPACE...
Interferometer systems are described in the form of publications and reports. 'Distance Meter Helps Track the Stars', 'Berkeley Heterodyne Interferometer', 'Infrared Heterodyne Spectroscopy of CO2 on Mars', and 'A 10 micron Heterodyne Stellar Interferometer' are papers reported.
Topics: NASA Technical Reports Server (NTRS), ANGULAR RESOLUTION, INFRARED INTERFEROMETERS, STAR TRACKERS,...
The design of a centrifugal impeller with blades that are aerodynamically efficient, easy to manufacture, and mechanically sound is discussed. The blade design method described here satisfies the first two criteria and with a judicious choice of certain variables will also satisfy stress considerations. The blade shape is generated by specifying surface velocity distributions and consists of straight-line elements that connect points at hub and shroud. The method may be used to design radially...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC CONFIGURATIONS, CENTRIFUGAL COMPRESSORS,...
To investigate the importance to fusion devices of desorption of gas from walls or cryosurfaces under long time operation, preliminary mass spectrometric investigations were carried out on the NASA Lewis Bumpy Torus with a 0.1-2A discharge in D2 at a pressure of 4.0 to 6.6 x 0.00001 torr. During the initial tens of minutes of discharge operation large quantities of a component with mass number 28, believed to be nitrogen, were released. The decrease with time of the nitrogen density after its...
Topics: NASA Technical Reports Server (NTRS), MAGNETS, MASS SPECTRA, NITROGEN, OUTGASSING, PLASMA...
Mar Vel Black is a revolutionary new extremely low reflectivity anodized coating developed by Martin Marietta of Denver. It is of great interest in optics in general, and in star trackers specifically because it can reduce extraneous light reflections. A sample of Mar Vel Black was evaluated. Mar Vel Black looks much like a super black surface with many small peaks and very steep sides so that any light incident upon the surface will tend to reflect many times before exiting that surface. Even...
Topics: NASA Technical Reports Server (NTRS), ACETYLENE, ANODIC COATINGS, REFLECTANCE, SOOT, STAR TRACKERS,...
Seismic data recorded at the Tonto Forest Seismological Observatory in Arizona and the Uinta Basin Seismological Observatory in Utah were used to compare the frequency of occurrence, severity, and spectral content of ground motions resulting from earthquakes, and other natural and man-made sources with the motions generated by sonic booms. A search of data recorded at the two observatories yielded a classification of over 180,000 earthquake phase arrivals on the basis of frequency of occurrence...
Topics: NASA Technical Reports Server (NTRS), EARTHQUAKES, NUCLEAR EXPLOSIONS, SEISMIC WAVES, SONIC BOOMS,...
A submicrosecond time dissemination system was developed. The system is composed of an experimental transit improvement satellite (TRIAD), TRANET Satellite Tracking System, and special satellite signal receivers each tied to separate cesium clocks. The 400 MHz signal from the satellite is phase modulated plus or minus 45 deg by a pseudo-random noise (PRN) digital code with a bit rate of 5/3 MHz. Evaluation of this system has shown that satellite oscillator frequency instabilities are the major...
Topics: NASA Technical Reports Server (NTRS), CLOCKS, SYSTEMS ENGINEERING, TIME MEASURING INSTRUMENTS,...
The filter was developed in Hilbert space by minimizing the radius of gyration of the overall or composite system point-spread function subject to constraints on the radius of gyration of the restoration filter point-spread function, the total noise power in the restored image, and the shape of the composite system frequency spectrum. An iterative technique is introduced which alters the shape of the optimum composite system point-spread function, producing a suboptimal restoration filter which...
Topics: NASA Technical Reports Server (NTRS), IMAGE FILTERS, IMAGING TECHNIQUES, PHOTOGRAPHIC PROCESSING,...
Fragmentation data was assembled and analyzed for exploding liquid propellant vessels. These data were to be retrieved from reports of tests and accidents, including measurements or estimates of blast yield, etc. A significant amount of data was retrieved from a series of tests conducted for measurement of blast and fireball effects of liquid propellant explosions (Project PYRO), a few well-documented accident reports, and a series of tests to determine auto-ignition properties of mixing liquid...
Topics: NASA Technical Reports Server (NTRS), FRAGMENTATION, LIQUID ROCKET PROPELLANTS, BLAST LOADS,...
The design, fabrication and flight testing of a powered elevator system for the Augmentor Wing Jet STOL Research Aircraft (AWJSRA or Mod C-8A) are discussed. The system replaces a manual spring tab elevator control system that was unsatisfactory in the STOL flight regime. Pitch control in the AWJSRA is by means of a single elevator control surface. The elevator is used for both maneuver and trim control as the stabilizer is fixed. A fully powered, irreversible flight control system powered by...
Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC CONFIGURATIONS, AIRCRAFT PERFORMANCE, ELEVATORS...
Pole figures of the texturing produced by friction in the alloys Cu - 10 at. % Sn, Cu - 10 at. % Si, 440 C stainless steel, and AISI 52100 bearing steel were obtained with an energy-dispersive X-ray diffractometer. While the texturing behavior of these alloys is generally similar to that of pure metals, the 52100 steel and the Cu5Si phase of Cu - 10 at. % Si show no texturing at the loads and speeds used in this experiment. Photographic methods were used in an attempt to measure the uniform...
Topics: NASA Technical Reports Server (NTRS), METAL WORKING, RESIDUAL STRESS, SLIDING FRICTION, COPPER...
The large space telescope (LST) pointing control system (PCS) advanced technical development (ATD) program is described. The approach used is to describe the overall PCS development effort, showing how the analytical ATD program elements fit into it. Then the analytical ATD program elements are summarized.
Topics: NASA Technical Reports Server (NTRS), HUBBLE SPACE TELESCOPE, POINTING CONTROL SYSTEMS, ALGORITHMS,...
The author has identified the following significant results. Wheat area, yield, and production statistics as derived from satellite image analysis, combined with a weather model, are presented for a ten county area in southwest Kansas. The data (representing the 1972-73 crop year) are compared for accuracy against both the USDA August estimate and its final (official) tabulation. The area estimates from imagery for both dryland and irrigated winter wheat were within 5% of the official figures...
Topics: NASA Technical Reports Server (NTRS), CROP IDENTIFICATION, KANSAS, LAND USE, WHEAT, AGRICULTURE,...
